Tissue culture flask



FIG. 1 is a perspective view of the tissue culture flask showing my new design;

FIG. 2 is a front view thereof on an enlarged scale;

FIG. 3 is a rear view thereof on an enlarged scale;

FIG. 4 is a left side view thereof on an enlarged scale;

FIG. 5 is a top plan view thereof on an enlarged scale;

FIG. 6 is a bottom plan view thereof on an enlarged scale;

FIG. 7 is a fragmentary cross sectional view thereof taken along section line 7--7 of FIG. 4.

The right side view not shown is the mirror image of the left side view shown in FIG. 4. 

An ornamental design for a tissue culture flask, as shown and described. 